Malicious PDF — malware analysis report

Static analysis result for SHA-256 feba0a2c34761af2…

MALICIOUS

PDF

78.7 KB Created: 2021-03-09 08:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2effcd4c6197080427ade70e70132b27 SHA-1: 26e654a818708440c1da4b9292f5b939c8e29b80 SHA-256: feba0a2c34761af209286e654454a73d7f963e70df6a58df15e08af5f92e1563
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a URL related to 'spotify premium apk cracked old version' indicates a lure for pirated software. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/123?utm_term=spotify+premium+apk++cracked+old+version PDF link annotation
    • https://gogozanep.weebly.com/uploads/1/3/4/6/134670655/6718338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5fd7ef0b37215.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/dodekasefama.pdfIn PDF document text
    • https://xujopikaxatanow.weebly.com/uploads/1/3/4/8/134850499/7503219.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489259/normal_5fe0faa6d5255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_6027266441e17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_6039b3c2ed58b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_600d92ba9ec73.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/54065655657.pdfIn PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/66648534c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosajeku.myartsonline.com/rapibovowoxu.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_47e260badc564c26955bea83a1fd49ef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42dfe39-06d9-47df-b27c-15c0bec89772/xisefopimijifajebason.pdfIn PDF document text
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_a1cc067c6ebe42338e57e2fcdd0a0efb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/belajar_photoshop_pemula.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/afib_guideline_2017.pdfIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_7dee1279b50b45de950075a21596d76e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8848dd50-6e94-4a99-b164-7aac2411373d/bissell_turboclean_powerbrush_pet_carpet_cleaner_2085_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d4d4ef-ee13-489f-b080-41ef90e5544f/8068203119.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_6d44429c0c454fd5b2533eec2d6539de.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5c7301-c6c1-4d7e-988d-09b1779a6c43/how_to_control_the_water_pollution.pdfIn PDF document text
    • https://12f7643e-9106-4823-89c2-0bdaecd1bc22.filesusr.com/ugd/1f6d71_67c21db5f7b54b4ab8638dab531a51a6.pdf?index=trueIn PDF document text
    • http://zubiluwetij.myartsonline.com/60765264128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e9014c-f9cd-483f-9ff6-ae0f3a56e143/37586092926.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF516 5632 bytes
SHA-256: ce23c3eac6f6d8de035c5f39365da958494dcf262ea0cf0276aec6dfaebb19d2
font_01_sfnt_off0001083a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083A 10696 bytes
SHA-256: 2f0656ab239879edf07c31035341efa26f0438eb05fd2fd755edc655244b0591

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